As the weekend's soakings dumped billions of gallons of water into Shasta Lake, California's largest reservoir reached 79 percent capacity — and 108 percent of its historic average — on Monday.

This was a major milestone for a lake that has flirted with record-low levels in recent drought years.

The lake dipped down to 889 feet in December 2014, and it was only 912 feet as recently as December 2015. (Shasta registered its lowest level ever, 837 feet above sea level, in 1977.)

But the storms are replenishing the lake, and the elevation on March 14 soared to 1,034 feet. In the last month, the reservoir has shot up 46 feet.

"The recent rain and snow systems are good to see, but we still need more snow in the mountains in order to finish the year strong," said Louis Moore, a deputy public affairs officer with the Bureau of Reclamation.